@HCBunny depending on your needs and budget, an ebike (possibly with more than two wheels) might also go into the comparison list. An upright trike with assist is less stable than a 4 wheel scooter, but also faster, probably cheaper and has longer range.

Similarly, LFP (LiFePo4) batteries are a huge upgrade on lead ones, but you may be better off buying those off AliExpress and DIY'ing because the disability market requirements make things slow to arrive and expensive when they do.